Experimental Study on the Transition Process to the Oscillatory Thermocapillary Convections in a Floating Half Zone

doi:10.1007/BF02889515

IMECH-IR > 力学所知识产出(1956-2008)

	Experimental Study on the Transition Process to the Oscillatory Thermocapillary Convections in a Floating Half Zone
	A Y(阿燕); Cao ZH(曹重华); Tang ZM(唐泽眉); Sun ZW(孙祉伟); Hu WR(胡文瑞); Aa, Y (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
发表期刊	Microgravity Science and Technology
	2005
卷号	17 期号:4 页码:5-13
ISSN	0938-0108
摘要	The transition process of the thermocapillary convection from a steady and axisymmetric mode to the oscillatory mode in a liquid bridge with a fixed aspect ratio and varied volume ratio was studied experimentally. To ensure the surface tension to play an important role in the ground-based experiment, the geometrical configuration of the liquid bridge was so designed that the associated dynamic Bond number Bd ≈ 1. The velocity fields were measured by Particle Image Velocimetry (PIV) technique to effectively distinguish the different flow modes during the transition period in the experiments. Our experiments showed that as the temperature difference increased the slender and fat bridges presented quite different features on the evolution in their flow feature: for the former the thermocapillary convection transformed from a steady and axisymmetric pattern directly into an oscillatory one; but for the latter a transition flow status, characterized by an axial asymmetric steady convection, appeared before reaching the oscillatory mode. Experimental observations agree with the results of numerical simulations and it is obvious that the volume of liquid bridge is a sensitive geometric parameter. In addition, at the initial stage of the oscillation, for the former a rotating oscillatory convection with azimuthal wave number m = 1 was observed while for the latter a pulsating oscillatory pattern with azimuthal wave number m = 2 emerged, and then with further increase of the temperature difference, the pulsating oscillatory convection with azimuthal wave number m = 2 evolved into a rotating oscillatory pattern with azimuthal wave number m = 2.
学科领域	力学
DOI	10.1007/BF02889515
收录类别	SCI
语种	英语
WOS记录号	WOS:000236139900002
关键词[WOS]	CYLINDRICAL LIQUID BRIDGES ; MARANGONI CONVECTION ; NUMERICAL-SIMULATION ; INSTABILITY ; VOLUME ; ONSET ; MODEL ; FLOW ; STEADY ; NUMBER
WOS研究方向	Engineering ; Thermodynamics ; Mechanics
WOS类目	Engineering, Aerospace ; Thermodynamics ; Mechanics
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16565
专题	力学所知识产出(1956-2008)
通讯作者	Aa, Y (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	A Y,Cao ZH,Tang ZM,et al. Experimental Study on the Transition Process to the Oscillatory Thermocapillary Convections in a Floating Half Zone[J]. Microgravity Science and Technology,2005,17,4,:5-13.
APA	阿燕,曹重华,唐泽眉,孙祉伟,胡文瑞,&Aa, Y .(2005).Experimental Study on the Transition Process to the Oscillatory Thermocapillary Convections in a Floating Half Zone.Microgravity Science and Technology,17(4),5-13.
MLA	阿燕,et al."Experimental Study on the Transition Process to the Oscillatory Thermocapillary Convections in a Floating Half Zone".Microgravity Science and Technology 17.4(2005):5-13.

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